Receptacle and method of making the same



July 2.6, 1932. w. T. scARRlTT RECEPTACLE AND METHOD OF MAKING THE SAME Filed Dc.

WITNESSES uw #j lATTORNEYS Patented Julyfze, lles? UNITED STATES PATENT oFFl-cEf WINTHBOP T. SCARRITT, OF UTICA, NEW YORK, ASSIGNOR TO THE PRATT CHUCK CO.,v

OF FRANKFURT, NEW YORK, A CORPORATION OF NEW YORK BEOEPTACLE AND METHOD OF MAKING THE SAME 'Applicationled December 11, 1929. Serial No. 413,413.

This invention relates to receptacles and methods of making the same.

It. is among the objects of the present invention to `provide a novel and improved re- 5 ceptacle of maximum strength as compared with the material used.

A further object of the invention is to-provlide novel means for forming such a receptac e.

A further object of the present invention is to provide a receptacle formed by a spiral strip of material, the edges of the strip being joined one to another to form a complete receptacle wall.

Another object of the present invention is to provide in a spirally formed receptacle improved interconnecting means for the adjacent edges of the spirals.

Another important object in the present invention is to providea spirally formed receptacle having soldered interlocking joints between the spirals thereof. v

A further important obj ect of the invention is to rovide a receptacle at junctures of wall formlng elements which are at an angle other than 180 with respect to the longitudinal stresses orl strains of the receptacle, and which are also at an vangle other than 180 with respect to transverse stresses or strains in the receptacle.

A further obj ect of the present invention is to provide an interlocking juncture for the connection of wall forming elements of receptacles which includes right-angularly directed abutment faces which will act to pre'- vent telescoping between theelements.

A further object of the present invention is to provide the improved method steps for the formation of a receptacle in embodying the above outlined objects.

Other objects of the present invention will be apparent from a consideration of the following specification taken with the accompanying drawing, in which Figure 1 is a side elevation of a fire extinguisher receptacle body, which is formed in4 accordance with the present invention; Figure 2.is a side elevation of a water b011- er formed inaccordance with the present inventlon;

in conj unctioni Figure/3 is a detailed sectional view of the juncture of 4the strips of material after the receptacle is formed; and

Figure 4 is a similar view illustrating a relation of the parts before rolling thereof.

In connection with the present invention, it will be seen by referring to Figures l and 2, that the invention is applicable to various types of receptacles. The invention is parmeularly adapted for the formation of receptacles which are subjected to unusual longitudinal and transverse 4strains.

By way of illustration, the invention is shown in Figure 1 in connection with a fire extinguisher, the receptacle body of which is formed by the spiral wound strips, by which construction the maximum strength of the receptacle is obtained with minimum material of the receptacle body. In connec-Y tion with Figure?l the invention is shown in connection with the body of a watery boiler. In both illustrations considerable strength in a receptacle body is required.

By the use of the present invention, it'has been found that in connection with iire extinguishers the unusually heavy material of the body is not required when the spiral con-l struction is used. It will be understood that the extinguisher is subjected to considerable internal expansion pressure and the present invention has been found to properly care for such pressure without resorting to heavy material or to internal or external braces.

In connectionwith the water boiler shown in Figure 2 it has been found that the present invention provides for the construction of a boiler with comparatively light material y without the use of the normal internal braces which are required in normal construction to prevent collapse of the boiler upon cooling.

derstood that the invention is not confined to the specific structures herein shown, but is adapted for use in connection with various types of receptacle walls being especially adapted for use in receptacles which are sub- 90 From the foregoing it will be readily un.

j ected to unusual stresses and'strains both of compression and expansion.

In connectlon with the present. lnvention the lcylindrical wall of theA receptacle isv helical spiral and having the adjacent edges lis of the strip interlocked whereby a cylindrical structure is provided. l

' Referring' more particularlyto Figures 3 and 4 of the drawing, it will be seen that the lower edge of the strip is provided with an inwardly extending bead or shoulder 11 which turns outwardly to form the outer side 12 yof the juncture portion. The side '12 has a return bend 13 terminating in a parallel internal flange 14. The upper edge ofthe strip provided with an externally extending shoulder 15 from whichv the strip extends inwardly to provide .the inner side 16, the side being return bent at 17 adjacent to shoulder 11 and terminating in an outer. internal fiange 18.

In forming the receptacle the adjacent upper and lower edges of parallel adjacent helixes of the strip are loosely connected as shown in Figure 4.

In the formation of receptacles adapted to resist strain it is preferable to provide solder or the like as indicated at 19 in Figures 3 and 4. The solder may be laid in a narrow strip` as indicated in Figure 4, and upon rolling of the structure to lightly unite the interlocking bodies to form the finished union as `shown in Figure 3, the solder is heated wheretion of the receptacle wall provides for the l angular relation of the juncture with respect to the direction of either longitudinal or` transverse strains, a substantial bias construction being provided whereby the strains are directed to the juncture on a bias thus mateu rially reducing the danger of rupture of the .junctures i 4 In connection with the shoulders 11 and 15 it will be seen in the linished juncture shown in Fi re 3 that the shoulders provide for substantial abutment for the sides of the `juncture whereby telescopic collapse thereof or disengagement movement thereof is provided.

In the formation of the invention it will be seen that the method steps include the spiral winding of a flat strip of material, the return bending of the edges of the strip either before or after the spiral winding, the loose interlocking of the return bent adjacent edges of the adjacent helixes of the strip, the

1 association between the flanges of the return bent portion of soldering material, and the subsequent rolling of the junction with the solder therein to press the return bent portions intov united relation and to heat the solder to form an interlocked soldering joint at the juncture of the edges of the strip.

From the foregoing it may readily be seen the invention provides a novel, simple and improved receptacle of simple and improved construction adapted to provide maximum strength with minimum material. It will also be seen the invention provides novel method steps by which the forming operation of a receptacle is continuous and economical.

It will be understood that the invention is bend of the edge of the next adjacent helix,

and a strip of solder fused between said return bend portions adapted tov retain said portions in interlocking relation and to provide a seal therebetween.

2. A receptacle comprising a body formedl by a spiral strip of material, the adjacent edges of the helixes of which include shoulders and interlocked return bends extending from the shoulders, .and a strip of solder fused between the return bends,l the return bends being pressed against the solder and the shoulders.

3. A rece tacle comprising a body formed by a spiral trip of material, the adjacent edges of the h'elixes of which include shoulioo ders extending outwardly and inwardly with interlocked return bends extending beyond the shoulders, and a strip of solder fused between the return bends,.the return bends bejng pressed against the solder and the shoulers.

4. A method of forming receptacles comprising the forming of a fiat strip into a spiral, uniting adjacent edges of the helixes of said spiral strip in interlocked relation with a strip of solder between the interlocked portions, and heating and rolling the inter.

locked portions into closed position to seal the joint.

5. A method of forming receptacles comprising the bending of a strip into a spiral, uniting adjacent edges .having shoulders and extending return bent portions of the helixes of'said spiral in interlocked relation with a strip of solder between the return bent portions, and heating and roll'mg the interlocked portions into closed position which presses the interlocked portions against the solder and the shoulders to seal the joint.

6. A method of forming a hollow body comprising the feeding of a strip of material and a Strip of solder, bending the strips of material and solder into a spiral, uniting adjacent edges of the helixes of said strip of material in interlocked relation with the strip of solder between the interlocked portions, and heating and rolling the interlocked portions intoclosed position to seal the joint. 7. A method4 of forming a hollow body comprising the feeding of a strip of material and a strip of solder, bending the strips of material and solder into ai spiral with the adjacent helixes of said strip of material interlocking with one side of the strip of material extending outwardly, then longitudinally of the hollow body in one direction, then inwardly and with its edge extending longitudinally of the hollow body in the opposite directlon, the other side of the 'strip of material extending inwardly, then longitudinally of the hollow body in the said opposite direction, 'then outwardly and with its edge extending longitudinally of the hollow body in the first mentioned direction and between the irst mentioned edge and'the first mentioned longitudinally-extending portion of the first mentioned side and with the strip of solder between the said two edges and also between the inwardly-disposed portion of the rst mentioned side and the outwardly-disposed portion of the second mentioned side, and

rolling the interlocked portions with the saidl strip of solder to substantially fill with the solder the space between the inwardly-disposed portion of the first mentioned side and the outwardly-disposed portion of the second mentioned side.

8. A method of forming a hollow body comprising the feeding of a strip of material and a strip of'solder, bending the strips of material and solder into a spiral with the adjacent helixes of said strip of material interlocking with one side of the strip of material extending longitudinally of the hollow body in one direction, then inwardly and with its edge extending longitudinally of the hollow body in the opposite direction, the other side of the hollow body extendin longitudinally of the hollow body in the sai opposite direction, then outwardly and with its edge extending longitudinally of the hollow body in the first mentioned direction and between the first mentioned edge and the first mentioned longitudinally-extending portion of the first mentioned side and with the strip of solder inwardly-disposed portion of the first mentioned side and the outwardly-disposed por.

tion of the second mentioned side.

9. A receptacle comprising a body formed by a spiral strip of material with one side of the strip of material extending longitudi nally of the hollow body' in one direction,

then inwardly and with its edge'extending.

longitudinally of the hollowbody in the opposite direction, the other side of the stri of vmaterial extending longitudinally of the 'oltion of the first mentioned side and-the outwardly-disp'osed portion of the second mentioned side.

10. A method of forminga receptacle coml WINTHROP QSCARRITT.

between the said two edges and also between the inwardly-disposed portion of the first.4 .mentioned side and the outwardly-disposed portion of the second mentioned side, and rolling the interlocked portions with the said strip of solder to substantially ll the-space between the said two edges andbetween the 

